1. Microbial Ecology Program, DOE Joint Genome Institute Walnut Creek CA USA
2. Structural and Computational Biology Unit, European Molecular Biology Laboratory Heidelberg Germany
3. Department of Pediatrics, University of Colorado Denver Aurora CO USA
4. Division of Environmental Science and Engineering, Colorado School of Mines Golden CO USA
5. Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder CO USA
6. Genome Biology Program, DOE Joint Genome Institute Walnut Creek CA USA
7. Institute of Molecular Biology and Swiss Institute of Bioinformatics, University of Zurich Zurich Switzerland
8. Microbial Ecology/Biogeochemistry Research Laboratory, Exobiology branch, NASA Ames Research Center Moffett Field CA USA